This product has the characteristics of good rigidity, strong specificity, high loading capacity, good stability, and a high sample recovery rate. The internationally recognized best method is to couple endotoxin analogs (modified polymyxin B) to agarose gel to make an affinity filler that specifically adsorbs endotoxin, so that it can specifically adsorb endotoxin, and the sample There is no loss in itself, we just couple this kind of substance to highly cross-linked agarose gel to prepare endotoxin-clearing agarose gel FF. This product can be directly added to the sample for endotoxin removal without a packing column, is easy to use and effective, in addition, the ligand will not fall off during use, is safe and reliable, and can be used repeatedly.